This rechargeable 365nm UVA LED Flashlight, sold by Advancedmart, does not have a formal name that I know of, so I'll just call it a "flashlight" on this web page.

It comes in an aluminum body, has a high-powered (3 watt) UVA (ultraviolet-A) LED in its bezel (head), uses a single 18650 rechargeable Li:ION (lithium ion) cell for power, and has a rubbery pushbutton on/off switch on its tailcap.

The battery (a 18650 rechargeable Li:ION cell) and charger are included, so you need not go out and purchase them before you can use this light.

The UVA ("ultraviolet type A" or "longwave ultraviolet") radiation emitted by this product is useful in many ways. Let's just name a few of them off from memory.

Checking money, credit card and ID cards for security features only visible under UVA radiation

* = Flashlight body is made by Ultrafire; I do not yet know how or where the modification to the high-powered UVA LED takes place; nor have I been able to determine the model number of the host body.

SIZE

To use this flashlight, feed it a freshly-charged 18650 cell first (see directly below), and then you can go irradiate those totally rad "blacklight" posters!!!

Press the button on the tailcap until it clicks and then release it to turn the flashlight on in "high" mode.
Press the button on the tailcap until it clicks and then release it to turn the flashlight off.
Press the button on the tailcap until it clicks and then release it to turn the flashlight on in "low" mode.
Press the button on the tailcap until it clicks and then release it to turn the flashlight off.
Press the button on the tailcap until it clicks and then release it to turn the flashlight on in "blink" mode.
Finally, press the button on the tailcap until it clicks and then release it to turn the flashlight off.

Just like it reads on the backs of many shampoo bottles, "lather, rinse, repeat". In other words, pressing the button on the tailcap until it clicks and then releasing it a seventh time turns the flashlight on in "high" mode.

To charge the battery, unscrew and remove the tailcap, throw it to the ground, and stomp on it with old or used bowling shoes...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

Tip the discharged 18650 Li:ION cell out of the barrel and into your hand, and recharge it. Do not attempt to dispose of it in a fire or by flushing, and for Christ sakes, please do not throw it into a trout-filled stream!!!

When the cell is fully charged, insert it into the flashlight barrel, orienting it so that its positive (+) contact goes in first.

Finally, screw the tailcap firmly back on.
Aren't you glad you didn't stomp on that tailcap now?

***DO NOT!!!***use standard CR123A cells in this product -- it will rather quickly burn out if you do, and your light will NOT be covered under warranty!!!

Photograph of the LED emitter (at the bottom of its stippled reflector) in this flashlight.

The flashlight appears to be reasonably sturdy. Ordinary flashlight accidents should not be enough to do it in. However, since this is a loaner, I will not perform the more abusive testing on it.

There are wide bands of knurling (diamond-shaped texturising) milled into the barrel and bezel (head), so retention (the ability to hold onto the flashlight when your hands are cold, soaked with diet Mountain Dew, unset Jello, milk, coffee, bird poop, water, etc. or oily) shouldn't be much of an issue.

This is a datasheet (in .PDF format) for the UV LED used in this product.
File is ~0.70 megabytes (736,518 bytes) in length; dial-up users please be aware.

The switch rubber (on the tailcap) glows in the dark when exposed to visible light or long UVA radiation.

Beam photograph at ~12".
A very large amount of the glow you see is fluorescence of the paper target.

Beam photograph on a nonreactive white wall at ~12".
Some of the glow you see now is caused by the digital camera;
most of them have trouble at these wavelengths.

The security stripe in a U.S. $20 bill fluorescing (glowing) when irradiated with this product.

Uranation on the side of a toliet bowl.
(Left): Without this light.
(Right): With this light.

Note that the pee shows up as light blue streaks when irradiated with this product.

Spectrographic analysis of the LED in this flashlight (high mode).

Same as above; spectrometer's response narrowed to a range between 340nm and 420nm to help pinpoint wavelength.

Spectrographic analysis of the LED in this flashlight (low mode).

Same as above; spectrometer's response narrowed to a range between 340nm and 420nm to help pinpoint wavelength.

Same as above; spectrometer's response narrowed to a range between 350nm and 390nm to help pinpoint wavelength, which is exactly 370.00nm.

Spectrographic analysis of the LED in this flashlight; newest (01-13-13) spectrometer software settings used.

Spectrographic analysis of the LED in this flashlight (newest (01-13-13) spectrometer software settings used); spectrometer's response narrowed to a band between 360nm and 380nm to pinpoint peak wavelength, which is 370.160nm.

Do you manufacture or sell an LED flashlight, task light, utility light, or module of some kind?
Want to see it tested by a real person, under real working conditions? Do you then want to see how your light did? If you have a sample available for this type of
real-world, real-time testing, please contact me at ledmuseum@gmail.com.

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